The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 52
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
Pagina 187
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
Pagina 191
... perhaps the most exciting of all the possibilities revealed by astronautics . Whether or not Man is alone in the Universe is one of the supreme questions of philosophy . It is difficult to imagine that anyone could fail to be interested ...
... perhaps the most exciting of all the possibilities revealed by astronautics . Whether or not Man is alone in the Universe is one of the supreme questions of philosophy . It is difficult to imagine that anyone could fail to be interested ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant Propontis propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight